adbradley

iTrader: (2)

I think i asked this once before, and didnt really get much of an answer, i will try again. I have read about this on The bipes web site and it seems to me like it would work.. Has anyone here tried it or tested it to see what kind of results it can create?

http://frontiernet.net/~dbipes/ertrick/index.htm

Jefe

iTrader: (7)

It could work pretty well, JR used it to fuel their SC's at one time.
You could get creative and use a map sensor with the op amp, set it up to trigger different Resistors at different psi's.

There is a guy on the EFI DIY board that has either 8 or 32 op amps running his fuel injection system.

I bought one of those Link 2000's a while back, opened it up, what was inside... three dip switches, two pots, a motorla MPX4250Ap, A 555 timer, an op amp, and an HBT... (Hell> both my cars all ready have those running the o2 clamps!!)

I say go for it, most of that diagram is just connecting to the IC, it looks like a lot but it really isn't.

adbradley

iTrader: (2)

Yeah, it seems very simple, thats why im wondering why no one does it.. I mean im sure its not enough to fuel an psi fuel system all together. But it seems that if you couple it with an adjustable FMU, you could get good results, as well as a lot of fine tuning adjustability.

rmcelwee

iTrader: (1)

I ran with one I made a few years back. How'd it work? Not really sure, I didn't have a WBO2 at that time but the theory was sound so I stuck one on. I got a Link a few weeks later so it didn't last too long. This was on a 12 PSI (M45) system.

Oh, I think more people don't use it because people are, in general, dumb asses that can't wire up something like that. With the JRSC M45 crowd, there were only a hand full of us who ever boosted high enough to need it.

adbradley

iTrader: (2)

well with its adjustability, its seems like it could acompany a non adjustable fmu quite nicely... do you still have the one you made? If so id love to buy it off ya and do some testing..

rmcelwee

iTrader: (1)

It would take me longer to find it than it would take you to make one. Just grab the docs and hit radio shack. I think I paid $10 for the parts (only two of them). I used a cap off a small spray can (think small wd-40 can) for the case. Wasn't anything fancy, just something to keep the wires from being ripped up by something in my glovebox.

Atlanta93LE

iTrader: (5)

Are you talking about the adjustable electronic version?

http://frontiernet.net/~dbipes/ertrick/index.htm

Or the simples physical version.?

rmcelwee

iTrader: (1)

What I built was not that complicated. It was a variable resistor that went in the air temp circuit.

Atlanta93LE

iTrader: (5)

Not even a pressure switch?

rmcelwee

iTrader: (1)

Yes, I put a pressure switch on it (didn't think of it because it was under the hood and the resistor was in the glovebox). The switch is about $30 at NAPA.

Atlanta93LE

iTrader: (5)

Man...looking at his webpage again, I wish he would finish up work on his FCU. That'd be a neat, cheap device that would help us a lot. Oh well.

fatty

i emailed him a few months ago about the map sensor project he has on his webpage. he told me that he stopped working on his miata projects "some time ago" and was not developing anything further for the miata.

that's a shame coz an acu , fcu , and map sensor / afm replacement woulda been a cool little set up .

adbradley

iTrader: (2)

yeah, it looks like he has moved on to his SLK, putting the miata on the way side for a damn benz.. very sad.. but at least he did leave us with a damn good ACU, and information and plans for the resistor trick and MSD mods.. Im for sure going to build the adjustable electronic version...